US2594037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrahigh-frequency filter
Assignee: RCA Corp
•
Filing: 1946-08-28
•
Granted: 1952-04-22
•
Expires: 1966-08-28
Abstract
No abstract record available.
Inventors
- 👤 Vernon D Landon
- 👤 Robert L Harvey
- 👤 Eugene O Keizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:19
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2142159A
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US2239905A
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US2398096A
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US2433386A
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US2438119A
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US2436830A
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US2469222A
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US2433387A
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US2408420A
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US2527664A
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US2516056A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |